HOUSTON - The Port of Houston Authority's operating revenue of $21 million for July 2013 surpassed July 2012's performance by $1.4 million or 7 percent.

Year-to-date revenue of $135 million was a 4 percent increase, or $6 million, from the same time in 2012.

July 2013's net income of $4 million represented a year-over-year increase of 47 percent, while year-to-date revenue of $25 million is an increase of 11 percent.

July 2013 tonnage of 3 million is a 4 percent increase over 2012, while the year-to-date total of 21 million tons represents a 3 percent increase from the same time in 2012.

Principal drivers for these earnings included a 21 percent increase in bulk exports for July 2013, an 8 percent increase in container tonnage for the year and a 17 percent increase in bulk commodities.